XTZ Room Analyzer or something else?

I'm in the market for a room analyzer system that is easy to use and will cover full range. My system is two channel (two speaker) only but eventually I'll have a home theater set up. Is the XTZ Room Analyzer my best bet or other free ware programs such as Room EQ Wizard? I want to optimize speaker placement and acoustic treatments. Ideally I would like something easy to use and easy to use :)

Thanks,

Aaron